The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 15, 2014
Filed:
Jan. 31, 2011
Akira Yamamoto, Yokohama, JP;
Masakazu Tohara, Kawasaki, JP;
Minoru Tsuji, Kawasaki, JP;
Shoichi Yamazaki, Yokohama, JP;
Akira Yamamoto, Yokohama, JP;
Masakazu Tohara, Kawasaki, JP;
Minoru Tsuji, Kawasaki, JP;
Shoichi Yamazaki, Yokohama, JP;
Canon Kabushiki Kaisha, , JP;
Abstract
The variable focus lens of the present invention changes the refractive power by changing each of the shapes of a first interface formed by a first liquid and a second liquid that have refractive indices that differ from each other and a second interface formed by the second liquid and a third liquid that have refractive indices that differ from each other. Thereby, this variable focus lens changes the first interface and the second interface such that the sign of the refractive power of the first interface and the sign of the refractive power of the second interface differ from each other.